On Dec 1, 2011, at 1:50 PM, Pat Hall DDPMOSTL wrote:

> In attempting to determine whether a given GPG public key is still in the 
> "acceptable" category of U.S. NIST SP 800-131A standards as of 2011, for DSA 
> keys I need to be able to verify both the |p| and |q| lengths.
> 
> In particular, I need to verify that DSA keys have |p| >= 2048 bits AND have 
> |q| >= 224 bits.
> 
> I can see numbers in the below examples of a DSA key of pkd:1:160 and 
> pkey[1]: [160 bits] - these look like the |q| value (which is in the 
> "Deprecated from 2011 through 2013, and Disallowed after 2013 range), but I'd 
> like verification that.

Yes.  When listing a DSA key or subkey, the lengths given in pkd:0 or pkey[0] 
are for "p", and the lengths given in pkd:1 or pkey[1] are for "q".

David


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